Luigi nasi



L. NASI.

(No Model.)

PUMP.

Patented May 4, 1886.

iNVBNTOB. M

1%tdMr ATTORNEY n PETERS, Pbowmh m. Waahingiom. n. c.

UNITED STATES PATENT OFFICE.

LUIGI NASI, OF TURIN, ITALY.

PUMP.

BPECIFICATION forming part of Letters Patent No. 341,042, dated May 4, 1886.

Application filed August 25, 1885. Serial No. 175,331.

(No model.)

Patented in Italy June 25, 1885, XXXVI, 333.

To all whom it may concern.-

Be it known that I, LUIGI N ASI, a subject of the King of Italy, and a resident of Turin, Italy, have invented certain new and useful Improvements in Pumps; andI do hereby deelare that the following is a full, clear, and exact description thereof.

The object of my invention is to produce a pump which is so constructed that the air within the same is automatically replaced when displaced by the constant use of the piston of the same.

Referring to the drawings, Figure 1 is a side sectional view of my improved pump. Fig. 2 is a sectional elevation on line was, Fig. 1. Fig. 3 is a plan view of same. Fig. 4 is an enlarged sectional view showing the automatic device for admitting air in the pump. Fig. 5 shows the application of my principle to great depths.

A is a metallic cylinder, with piston A, piston-rod A and lever m.- This cylinder is closed at the top and bottom. This cylinder A is joined to receptacle B by the tube 0, as shown, and to the receptacle B by the tube 0. These tubes 0 C are made of india-rubber.

D are valves. D is the inlet-pipe; D, the outlet-pipe.

The parts can be made of any size and material, and are supported on the bracket 2, as shown.

By forcing orlifting the arm an upward the piston A is raised and the air in cylinder A above the piston-head is forced out through the tube 0 into receptacle B, and the air in receptacle B is sucked out through tube 0 into the cylinder A, below the piston-head. A vacuum is thereby formed in receptacle B, which permits the fluid to pass through inlet D and valve D into cylinder A. IVhen the piston is moved downward, the air in the cylinder A below the piston is forced out'into the receptacle B, on the top of the fluid, and thus forcing it out through the outlet-pipe D By this downward motion of the piston the receptacle B is emptied of the air and the fluid allowed to enter it as it did receptacle B. This operation is kept up as long as the piston is operated; but in course 'of time the air in A will diminish and allow the fluid to enter it through the tubes 0 G and thereby destroy theuse of the pump and its parts. To overcome this difficulty, I use floats Z, placed within the cylinders B B, connected by arms h and eto the supports 6 The arms are provided with the short arm 9, which rests upon the top of the weighted end of the valve-arm (I. They are provided with valves a, placed over the openings 0 c in the top of cylinders B B. When the air in the cylinder A becomes diminished to such an extent as to allow the fluid to rise in same, it (the said fluid) will touch the float Z, raise it, and release short arm 9 from valve-arm d. This movement allows the valve to immediately open, as there is a vacuum formed in receptacle B around the valve. The outside air will then overbalanee the weighted end of valve-arm, open the valve, and enter the receptacle B through the opening 0 c. \Vhen sufficient air has been admitted,the valve will close,the float drop, and hold the valve closed. This action takes place in both receptacles, as they are both provided with this automatic air-admitter. By this construction a sufficient quantity of air is constantly kept up within the pump and the fluid prevented from touching any of the destructive parts, the pump being principally used for fluids containing acids.

Fig. 5 shows the cylinder A placed at the top of cylinder B below and cylinder B midway. It will be seen that the fluid from B is forced into tank c and fluid from B into tank y. By this adjustment I am enabled to raise water to a considerable height. The automatic ainsupplier can be used with this arrangement, if necessary.

Having thus described my invention, I desire to claim- 1. In a pump, the automatic airsupplier, consisting of the float Z, arms h and 6, arm d, and valve a, in combination with the cylinder A, having opening 0, and the tubes 0 G, substantially as and for the purpose set forth.

2. In a pump, the cylinder A, with the pis ton A, in combination with the tubes 0 O, the receptacles B B, and the automatic airsupplier, consisting of the float Z, arms h and 6, arm d, and valve a, substantially as and for In testimony that I claim the foregoing I the purpose set forth. 7 have hereunto set my hand.

3. In a pump, the cylinder A, piston A, tubes G O, receptacles B B, valves D, outlet- LUIGI NASI. 5 pipe D, inlet-pipe D float Z, rods h and e,

arm (I, valve a, opening 0, and bracket 2, all \Vitnesses: arranged substantially as and for the purpose LEONDO CORLA, set forth. J ALEZZANDRO BENGAREINJ'Q. 

